Treadle mechanism.



No. 630,194. atented Aug. I899. P. DIEHL.

TREADLE MECHANISM.

Application filed Dec. 8, 1898.)

(No Model.) 2 Sheets-Sheet l.

WITNESSES:

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UN rrisii Starts AnNt retort PHILIP DIEIIII, OF ELIZABETH, NElV JERSEY, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY, OF NE\V JERSEY.

TREADLE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 630,194, dated August 1, 1899.

Application filed December 8, 1898- Serial No. 698,609. (No model.)

To a5], whom it may concern.-

Be it known that I, PHILIP DIEHL', a citizen of the United States, residing atElizabei h, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Treadle Mechanisms, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to that class of treadle mechanisms for use in driving sewingmachines, lathes, and the like in which power is transmitted to the driving-wheel shaft from swinging or pendulous treadle-levers through suit-able clutches connecting with said shaft, the object of the invention being to provide a treadle mechanism of the class referred to which is simple in construction and light ru nning and practically noiseless in operation. To this end the improved treadle mechanism comprises two swinging segment-gears meshing with pinions having clutch connections with a driving-wheel shaft preferably mounted to run on ballbearings, one of said segment-gears being connected with a treadleshaft mounted in suitable bearings and provided with a swinging treadle arm or lever and the other of said segment-gears and its treadle arm or lever being mounted to swing on said shaft, all as will be hereinafter more fully described.

In the accompanying drawings, Figure l is a front side view of a sewing-machine stand embodying the invention. Fig.2 is a sectional end view of the same on line 2 2, Fig. 1,

with the table removed and with the outline of a side framein dotted lines. Fig. Sis a detail sectional view showing the driving-shaft and its ball-bearings and clutch devices. Fig. 4 is an enlarged detail view of one of the ball boxes, and Fig. 5 a detail view of one of the loose clutch-collars and its clutch-dog.

A A denote the legs or side frames of a sewing-machine stand, and B a brace connecting said legs or side frames and suitably bolted thereto, said brace being furnished on its front side with forwardly-projecting lugs b, in which is journaled the rocking treadleshaft 0, provided with a depending treadle arm or lever 0, having a pivoted foot-piece 0. Attached to the right-hand end of the shaft 0 is a segment-gear C, and loosely mounted on said shaft by its collar 0 is a second segment-gear G with which is rigidly connected a second treadle arm or lever 0 also having a pivoted foot-piece o.

D is the driving-wheel shaft, provided with the driving wheel or pulley D, which is to be belted to a sewing-machine or other pulley to be driven. Loosely mounted on the shaft D are two collars d, each provided with a pinion d, with which the segment-gears 0 O mesh, said collars at both having clutch connections, by means of spring-pressed clutchdogs (P, with an interposed hub or collar 0Z fixed to the said shaft D, or it may be integral therewith. To reduce friction, wear, and noise, the drivingwvheel shaft D is preferably constructed with conical ends runningin ballbearings, one or both of which may be adjustable in any suitable manner to take up wear when necessary.

F is a knee brake-lever having a brakeshoe f, of rubber or other suitable material, adapted to be forced against the side of the driving-wheel D against the stress of a retracting-springf'.

In the operation of the improved treadle mechanism the clutch-dogs d are caused by the action of the spring d to grip flanges of the fixed hub or collar d", and thus rotate the shaft D, when the treadle arms or levers c and c are swung forward or from the operator, said clutch-clogs being released from said collar d when the movements of said treadle arms or levers are reversed, so as to move freely backward with the loose collars d and pinions dwhen the movements of said pinions and loose collars are reversed by the segment-gears O and' C, connected with said treadle arms or levers and meshing with said pinions; The segment-gears O O are in operation to be swung back and forth alternately by their operating treadle arms or levers c 0 as will be understood.

By employing a short and comparatively light driving-wheel shaft having its bearings in a loop at one side of the brace B, said loop consisting of the bars I) and b and their upper and lower connections, and by arranging the two swinging segments and their clutch connectionswith said shaft in said loop, these parts are located entirely out of the way of the operator, this arrangement; of these parts being more compact and convenient than in the constructions of swinging treadle mechanisms heretofore in use, in which long and comparatively heavy driving-wheel shafts have been employed and in which the segment-gears and their clutch connections with the driving-wheel shafts were in front of the operator and were thus more or less in the way.

The ball-bearin gs for the conical ends of the driving-wheel shaft Dwhich are preferably employed consist, as herein shown, of ball cases or boxes e e secured in the bars I) b of the brace B, and which bars form the loop inclosing the driving-wheel shaft. Each of these boxes contains a series of balls 6, surrounding a conical end of said shaft, and the said balls being held in their cases or boxes by rings or washers 6 held in the ball cases or boxes by slightly-undercut gains formed at the ends of the boxes, and into which gains the washers, originally formed slightly crowning, are pressed. The box 6 is secured in the bar 1) by a set-screw e and the box 6 has screw-threaded parts 6 fittingin a tapped hole in the bar b to permit of delicate adjustment to take-up wear, a set-screw 6 engaging said box between its threaded parts,- serving to hold said box in any desired position.

Having thus described my invention, I claim and desire to secure by Letters Patentl. In a treadle mechanism, the combination, with a stand comprising legs or side frames and a connecting-brace provided at one end with aloop, of a driving-wheel shaft mounted in said loop, a clutch hub or collar rigid with said shaft, collars loose on said shaft and having clutch connections with said fixed hub or collar, said loose collars being provided with pinions, two independently-movable, swinging segment-gears also arranged in said loop and meshing with said pinions, and swinging treadle arms or levers connected with said segment-gears.

2. In a treadle mechanism, the combination with a stand comprising legs or side frames and a connecting-brace provided at one end with a loop, of a driving-wheel shaft mounted in said loop, a fixed clutch hub or collar on said shaft, loose collars having clutch connections with said fixed hub'or collar and provided with pinions, said shaft having conical ends, ball-bearings in which the said conical ends of said shaft are mounted, independently-movable segment-gears meshing with said pinions, and swinging treadle arms or levers connected with said segment-gears.

3. In a treadle mechanism, the combination with a rock-shaft mounted in suitable bearings, of a depending treadle arm or lever and a segment-gear both attached to said shaft, a second segment-gear loosely mounted on said shaft so as to rock thereon, a treadle arm or lever rigidly connected with said looselymounted segment-gear, and a driving-Wheel shaft With which said segment-gears are operatively connected.

4. In a treadle mechanism, the combination with a rock-shaft mounted in suitable bearings and provided with a depending treadle arm or lever and with a segment-gear, of a second segment-gear loosely mounted on said shaft, so as to rock thereon, and having a rigid treadle arm or lever, a driving-wheel shaft, a single fixed clutch hub or collar and two loose collars all mounted on said shaft, said loose collars having clutch connections With said fixed clutch huh or collar.

5. The combination with the treadle-shaft C mounted in suitable bearings and provided with the treadle arm or lever c and the segment-gear O, of the swinging segment-gear O having its pivotal bearing on the said shaft, the treadle arm or lever o rigidly connected with said segment-gear C the driving-wheel shaft D, the pulley D, the fixed hub or collar d and the loose collars d provided with pinions d and havingclutch connections with said fixed hub or collar d 6. The combination with the legs or side frames A, A, thebrace B connecting said legs or side frames and provided on its front side with the forwardly-projecting lugs b, and the treadle-shaft 0 having its bearings in said lugs, the treadle arm or lever c and the segment-gear O, of the swinging segment-gear C having its pivotal bearing on the said shaft, the treadle arm or lever c rigidly connected with said segment-gear G the drivingwheel shaft D, the pulley D, the fixed hub or collar d and the loose collars d provided with pinions d, and having clutch connections with said fixed hub or collar d 7. In a treadle mechanism, the combination with a treadle-operated driving-wheel shaft provided with conical end portions, of ballbearings for said shaft consisting of boxes or cases each having a series of balls encircling a conical end portion of said shaft, and a washer secured at the end of each box in a slightly-undercut gain to hold the balls in the boxes.

8. In atreadle mechanism, the combination with a treadle-operated driving-wheel shaft provided with conical end portions, of ballbearings for said shaft consisting of boxes or cases each having a series of balls encircling a conical end portion of said shaft, and a washer secured at the end of each box in a slightly-undercut gain to hold the balls in the boxes, one of said boxes having a sore w-th read adjustment to take up wear.

in testimony whereof I affix my signature in the presence of two witnesses.

PHILIP DIEHL.

WVitnesses:

HENRY J. MILLER, HAROLD W. BROWN. 

